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Aviation History
1926
1926 - 0006.PDF
I • 5?,o*i*S.J JANUARY 7, 1926 THE BLACKBURNE "THRUSH": The two upper photographs show—On the left, a view inside the ribbed front half of the crankcase. Right, a front view of the rear half of the crankcase. Below, on the left, the same is shown from the timing-gear side ; and on the right, the back cover of the engine. " Thrush" are shown on the accompanying installation diagram. It may be mentioned, however, that the bore is 81 mm. and the stroke 96-8 mm., giving a capacity of 1,494 ex. The normal speed of the engine is 2,500 r.p.m., which is low enough to allow of direct drive, and yet obtain reasonably good propeller efficiency. At this speed, the engine develops 35 b.h.p. The maximum permissible speed is 2,750 r.p.m., when the power is 38 b.h.p. The weight of the engine, includ- ing oil suq$B, exhaust pipes, induction and ignition system, impulse starter, propeller hub, &c, is 132 !b., corresponding to a specific weight of 3-77 lb./h.p., based on normal power. This figure includes oil sump, exhaust pipes, induction manifold, carburettor, magneto, impulse starter, propeller hub. etc. Thus, the engine is not exactly alight weight, but its robust and simple construction, coupled with the low fuel consump- tion should easily outweigh any slight disadvantage due to the weight. The engine is easy to^ dismantle and overhaul, and its maintenance should present no difficulty to any- one at all used to internal-combustion engines. The R.E.P. "Joystick" Claim THE French Court of Cassation has given judgment in favour of the claim for 3,000,000 fr. by M. Esnault Peltrie in connection with his invention of the " Joystick " aero- plane control. This will probably result in further claims and actions, not only in France but in other countries, and some will wonder why it is called a " joy " stick. American Aeronautical Safety Code Published THE American Aeronautical Safety Code, one of a seriesof safety codes formulated under the rules of procedure of the American Engineering Standards committee, is now issued.In drafting the code the intention was not to prescribe too closely the acceptable methods of design, construction oroperation, but to formulate criteria of good practice that would promote a general agreement and understanding as to acceptable safety standards. The code includes the follow- ing parts :—Introductory Part ; Part I, Aeroplane Structure, Design, Fabrication and Tests ; Part II, Power Plant?. Design, Assembly and Tests ; Part III, Equipment, Main- tenance and Operation of Aeroplanes ; Part IV, Signals and Signalling Equipment • Part V, Aerodromes and Airways ; Part VI, Traffic and Pilotage Rules ; Part VII. Qualifications for Airmen ; Part VIII, Balloons (Free and Captive) ; Part IX, Airships ; Part X, Parachutes. Itis published and dis- tributed by the Society of Automotive Engineers, Inc., 29, West 39th Street, New York City. The price for single copies or small quantities is $1 -50 each ; for larger quantities a reduced price will be quoted. Orders should be addressed to the Society of Automotive Engineers. 6
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